I was thinking about cheaney or barker.
I saw at least 4 models made by cheaney on the shipton website.

And regarding their hypothetical line made in Naple the unique name that comes to my mind is Campanilehttp://www.campanile1.com/ but I don't think it's a model in their style.
Do you know the company's name of Naple? I'm curious, as Naple is not known for making shoes

Shipton and Heneage use a number of Northampton factories to make their shoes including Crockett & Jones, Cheaney, Sanders and at one stage Alfred Sargent. Now much of the cheaper items are made in Europe but all the expensive ones are still Northampton made. None of the shoes are Indian or Chinese unlike many of the cheaper mail-order offerings. When it comes to shoes you are likely to get what you pay for, it simply isn't possible to buy a decent goodyear welted shoe that is worth owning for less than around 180 quid, if you pay less, then compromises will have been made to quality, materials or workmanship or all three.

The factory gate price for a premium Northampton shoe is now well over 100 pounds.